But did they move the dolly away from the school and hospital before the crash? That makes the pilot a hero.
Dollies have always been a challenge - make it big enough to reduce all risks, and it weighs a ton, costs a fortune to build, and takes up too much space in the hangar. And a big strong trolley has big wheels, which increase the falling risk for those working up on the deck. And make sure you don't put a lip on it, they are famous for catching a skid and rolling the bird over.